108 PROCEEDINGS OF THE NATIONAL MUSEUM vol.89 



on inner side into small spines. Thorax highly polished, with fine 

 sparse punctures separated by a distance equal to two to four times 

 their diameters, denser at sides and apex, usually disk entirely glabrous, 

 rarely with few hairs near margins; lateral margins moderately 

 strongly crenulate, with long cilia; base and apex of thorax strongly, 

 entirely margined; angles subangulate and very obtuse. Elytra 

 moderately densely, finely punctured, and rugosely wrinkled, with 

 short sparse suberect hair; costae, except sutural, not indicated. 

 Pygidium convex, shining, very sparsely and finely punctured, punc- 

 tures sparsest near apex, with short suberect hairs, apex subtruncate. 

 Abdomen flattened at center, with very shallow, rather wide, median 

 longitudinal sulcus; surface finely sparsely punctate, with short and 

 erect hairs; fifth plane; sixth usually slightly longer than fifth, flat- 

 tened, punctured as fifth, apex ciliate. All claws finely serrate to 

 subpectinate along a double margin, usually the serrations of similar 

 size, rarely with the outer row of outer front claw with a much larger, 

 submedian, acute tooth. First and second hind tarsal segments sub- 

 equal in length and of nearly the same shape and width throughout. 



Female. — Antennal club equal to funicle. Clypeal disk with or 

 without an impunctate area at the base; apex less reflexed than in the 

 male and more widely rounded. P3'^gidium convex but flattened on 

 disk, highly and entirely polished, with sparse, very fine punctures, 

 each bearing a minute subprocumbent hair; apex rounded, slightly 

 declivous, ciliate. Front and middle claws serrate along a single 

 margin and each with a small median tooth intercalated with the serra- 

 tions; the inner of the hind claws without a larger intercalated tooth 

 and the larger tooth of the outer claw very minute or absent (in the 

 two examples at hand). Abdomen convex, highly polished, nearly 

 glabrous and impunctate at center; fifth segment finely and sparsely 

 punctate, with fine suberect hairs; sixth segment more coarsely 

 punctate than the fifth. Otherwise as in the male. 



Length.— \2-\^ mm. Width. — 5.5-7 mm. 



Types.— "Deming, New Mexico, August 1918 (Wickham)" (male) 

 and"Castolon, Tex., June 11, 1928 (F. Bibby)" [Remhard] (female), 

 both in the United States National Museum (No. 53771). 



Paratypos: Males, 12; females, 2. New Mexico: Deming, July 11, 

 4,300 feet (Wickham) [U. S. N. M.j; Pyramid Peak, Dona Ana Coimty, 

 July 30 (Fosberg) [Los Angeles Museum and Saylor] ; "N. M., August" 

 [Van Dyke]. Texas: Brewster County, Chisos Mountains, July 10 

 (Mitchell and Cushman) [U. S. N. M.j; Castolon, June 11 (F. Bibby) 

 [Reinhard]; Marathon, June 18 (Linsley) [Saylor]; Presidio County, 

 July 16 (Beamer) [Snow Museum]. Arizona: Wilcox, July 24 

 (Hubbard and Schwarz) [U. S. N. M.]; "Arizona" (Al Meade) [Saylor]. 



